Liquid-cooler



(No Model.) 2 Sheets-Sheet 1.

P. W. WOLF.

' LIQUID COOLER. No. 301,035. v PatentedJ-une 24, 1884.

(No Model.) 2 Sheets-Sheet 2.

F. W. WOLF.

LIQUID COOLER. No. 801,035. Pa'pented'June 24, 1884.

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21422 72683 68. fweiza'n' ltlnrrnn dramas Parana tries.

FREDERICK WV. IVOLF, OF CHICAGO, ILLINOIS.

' LBQUlD-COOLER.

SPECIFICATION forming part of Letters Patent No. 301,035, dated June 24, 1884:. Application filed April .iO, 1883. (No model.)

T0 at whom, it may concern Be it known that I, Fnnnnnrox W. WOLF, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful.

Improvements in Liquid-Ooolers; and I here by declare the following to be a full, clear, and exact description of the same.

My invention relates to the class of devices used in the process of brewing for the purpose of checking fermentation by cooling the beer during the fermenting stage; and my object is to construct a liquid-cooler which shall permit a gradual and uniform cooling of the liquid.

To this end my invention consists in a liquidcooler of the construction hereinafter de scribed, whereby the cooling influence supplied to it through the medium of cold water is communicated to the liquid in which it is immersed by means of the presentation of a large extent of cooling-surface.

I11 the drawings, Figure 1 is a perspective view of my device,with a portion of the outer shell broken away at the bottom to show the interior construction; Fig. 2, ahorizontal section of the device; Fig. 3, a vertical section of the same,taken at one side of the center; Fig. 4, an elevation of the upper part of the device,having a portion of the outer shell brokenaway to show the internal construction; and Fig. 5, a detail, view.

The device is a hollow cylinder in form, and comprises an exterior shell, A, of suitable metal, having its upper edge bent inward to form an inwardly-projecting flange. The flange is firmly secured to the upper edge of the interior shell, B, to form a tight covering for the interposed annular chamber G, formed by making the two shells concentric. This flange is preferably of such width that the chamber between the two shells may be threesixteenths of an inch wide,this being the preferable dimension, though it can of course be increased or diminished by making the flange broader or narrower. The interior shell, B, is provided on its lower edge with a similar flange formed in like manner and intended to answer the same purpose as the other. This interior shell, 15, has secured to its external surface a helical wire, rod, or bar, to, after the manner of a screw-thread. equal in body to that of the annular chamber C, to form a close helical passage leading from the discharge-opening o to the outlet-pipe a.

D is averticaltubc closed at both ends and firmly braced in position in the center of the device by means of a three-brancli,T, consisting at the top of the inlet-pipe t, and blind branches t and t ,to receive braces s and r, and at the bottom by the discharge-pipe q and braces s and 1. These braces and tubes, besides the important function of the latter,tend greatly to strengthen the device, the two former at the bottom being rigidly secured to the tube D and to the inner surface of the interior shell, B,while the remaining ones, 8 and r, at the top, (the last named of which will, however, be more particularly described here inalterg) and the tube 25, though not the tube g, which rests in the orifice 1;, formed in the inner shell, B, to constitute the water-discharge opening, pass through and are rigidly secured in circular openings extending through both shells.

To operate my device it is provided with hooks m, one on each projecting support. To each of these hooks is attached a rod, chain, or rope, Z, the three converging together over the center of the device, as shown, where they are attached to a hook fastened to a rope or chain, or some equivalent mechanism suspended for convenience of operation over a pulley secured to the ceiling or to an overhanging beam, whereby the apparatus may be raised out of or lowered to any desired distance into the vat containing the liquid to be cooled. If desired, the projecting arms may be sufflciently extended to permit of resting the appliance upon the edge of-the vat; or the device may be made to float in the liquid by providing a hollow trough to extend around its upper "circumference.

The cooling medium in the form of cold water is supplied to the device from a pipe lying across the room by means of the hose 0, which is coupled thereto, and also, as is shown in the drawings, to the tube 16. This pipe has a suitable valve to regulate the flow of water. On entering the inlet-pipe t, the water passes down the central tube, D, thence through the discharge-pipe q and opening 12 along the heli cal passage 0' to the outlet-pipe a, where it escapes. The construction of the outlet-pipe tending across the annular chamber 0, the

pipe being so arrangedthat the water passing up the helical passage must enter this hole and be discharged through the pipe 10.

\Vater in its natural state attains different temperatures at different seasons of the year;

and since it is desirable to allow it to flow through the device in a continuously-discharging stream, it is obvious that, unless controlled in its discharge, the colder the water theless liable it is to receive all the heat it is capable of receiving before its escape, and it will, if sufficiently cold on entering, be discharged at a lower temperature even than the liquid in the vat, thereby causing great and unnecessary waste of water. This is obviated by means of a valve, n, in the outlet-pipe u, whereby the water is permitted to escape in such quantity as will allow that contained in the device to acquire the same temperature as the liquid contained in the vat. It is by means of this control of thewater in the device that fermentation the most important step in the manufacture of beer-is best controlled,whether the device is employed in breweries or in-distilleries.

The device is of such dimensions, and, as will be seen from the foregoing description, of such construction, thatwhen lowered into a vat of the size to which it is adapted, different sizes being required for vats of different dimensions, it presents to the liquid upon which its influence is to be exerted cooling-surfaces which act upon nearly equal quantities of liquid upon the inside and outside of the cylinder, thus securing a gradual and uniform decreasing "of the' temperature throughout, Where vats are so small that they require coolers of very small dimensions it may become necessary in constructing the device to change the position of the central tube, D, by placing the latter either against the inner or outer shell, since a central position in small coolers would render the operation of cleaning them difficult.

I do not claim, broadly, as my invention a liquid-cooler formed of two concentric shells having an annular space between them containing a spiral formed upon the outer surface of the inner shell in the manner of a screwthread, and a centraltube within the inner shell, to provide means for introducing water into or discharging it from the said annular chamber.

\Vhat lclaim as new, and desire to by Letters Batent, is

1. A liquid-cooler comprising two concentric' hollow cylinders joined together at the top and bottom to produce a single hollow cylinder, and to provide an inclosed annularspace between them, and having a helical partition within the said annular space to form a helical passage, 0, leading to a dischargeopening, a, formed in the side of the outer cylinder, a vertical pipe, D, secured in position within the inner of the said concentric cylinders and having an opening in its side toward the upper end connected with a lateral opening through the said concentric shells to admit water into the said pipe, and an opening in its side toward the lower end leading into the said hellical passage to conduct the water into the said passage whence it passes around the helical passage 0 to the opening a, where it discharges,for the purpose set forth.

2. A liquid-cooler comprising in combination the following elements, viz: hollow cylinders A and B, joined together at the top and bottom to produce a single hollow cylinder, and to provide an inclosed annular space between them, a helical partition within the said annular space to form a helical passage, 0, leading to a discharge-opening, u, formed in the side of the cylinder A, a vertical pipe, D, secured in position within the cylinder B, and having an opening in its side toward the upper end, connected with a lateral opening through both shells A and B, to admit water into the" pipe D, and an opening in its side toward the lower end leading into the said helical passage, and means, substantially as described, for supporting the device and lowering it into the liquid to be cooled and raising it therefrom.

FREDERICK XV. \VOLF;

In presence of WM. H. DYRENFORTH, Enw. 1VICCAFFREY. 

